I keep and have kept several and I agree with Crimsonking. I keep mine an dry substrate with a decent sized water bowl. When it is feeding time I usually replace the water bowl with a larger bowl with fish. I've been keeping them since 2005 and a buddy of mine since 04. From time to time I have offspring available. They are a fun species to work with and to observe them 'hunting' their food is amazing. And their disposition is calm and laidback!